This paper present an eco-morphodynamic analysis on causes of erosion along degraded mangrove-mud coasts, and the causes of failure to rehabilitate these coasts. The analyses are based on studies in Thailand, British Guyana and Suriname, and observations in Indonesia, the Philippines and southern China, where degradation is directly attributed to the erection of fish/shrimp ponds too close to the waterline. Ecological determinants of low success rates of rehabilitation efforts are well explained in literature, and are briefly summarized in this paper. The analyses show that ongoing erosion of degraded mangrove-mud coasts are also the result of a disturbed balance in fine sediment dynamics, and the subsequent change in mudflat morphology. Based on the current analysis, this paper present ingredients for a more sustainable use of mangrove-mud coastal systems, and a more successful rehabilitation of eroding mangrove-mud coasts.
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